// Java 3Dテスト用アプレット
// AppearanceTest.java
//   Copyright (c) 1999 ENDO Yasuyuki
//                      mailto:yasuyuki@javaopen.org
//                      http://www.javaopen.org/j3dbook/index.html

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.universe.SimpleUniverse;
import com.sun.j3d.utils.geometry.Box;
import com.sun.j3d.utils.geometry.Cone;
import com.sun.j3d.utils.geometry.Sphere;

public class AppearanceTest extends Applet {
  TransparencyAttributes tattr = null;

  public AppearanceTest() {
    Panel panel = new Panel();
    this.setLayout(new BorderLayout());
    this.add(panel, BorderLayout.NORTH);
    
    panel.add(new Label("Transparency"));
    TextField tfield = new TextField("0.0", 4);
    tfield.addActionListener( new ActionListener() {
      public void actionPerformed(ActionEvent e)  {
        float value = 0.0f;
        try {
          value = Float.parseFloat(e.getActionCommand());
          if (value > 1.0f) value = 1.0f;
          if (value < 0.0f) value = 0.0f;
          System.out.println("value=" + value);
          tattr.setTransparency(value);
        } catch (NumberFormatException ex) { }
      }
    });
    panel.add(tfield);
    
    Choice choice = new Choice();
    choice.add("BLENDED");
    choice.add("FASTEST");
    choice.add("NICEST");
    choice.add("NONE");
    choice.add("SCREEN_DOOR");
    choice.select(3);
    choice.addItemListener( new ItemListener() {
      public void itemStateChanged(ItemEvent e) {
        String item = (String)e.getItem();
        if (item.equals("BLENDED")) {
          tattr.setTransparencyMode(TransparencyAttributes.BLENDED);
        } else if (item.equals("FASTEST")) {
          tattr.setTransparencyMode(TransparencyAttributes.FASTEST);
        } else if (item.equals("NICEST")) {
          tattr.setTransparencyMode(TransparencyAttributes.NICEST);
        } else if (item.equals("NONE")) {
          tattr.setTransparencyMode(TransparencyAttributes.NONE);
        } else if (item.equals("SCREEN_DOOR")) {
          tattr.setTransparencyMode(TransparencyAttributes.SCREEN_DOOR);
        }
      }
    });
    panel.add(choice);
    
    GraphicsConfiguration config =
      SimpleUniverse.getPreferredConfiguration();

    Canvas3D canvas = new Canvas3D(config);
    this.add(canvas, BorderLayout.CENTER);
    
    SimpleUniverse universe = new SimpleUniverse(canvas);
    universe.getViewingPlatform().setNominalViewingTransform();
    
    universe.addBranchGraph(createSceneGraph());
  }
  
  public BranchGroup createSceneGraph() {
    BranchGroup root = new BranchGroup();

    Light light1 = createLight( new Color3f(0.7f, 0.7f, 0.7f),
                                new Vector3f(0.5f, -0.5f, -0.7f) );
    root.addChild(light1);
    
    Light light2 = createLight( new Color3f(0.3f, 0.3f, 0.3f),
                                new Vector3f(-0.5f, -0.5f, -0.7f) );
    root.addChild(light2);
    
    Transform3D t3d = new Transform3D();
    t3d.rotX(Math.PI / 8.0);
    Transform3D roty = new Transform3D();
    roty.rotY(Math.PI / 4.0);
    t3d.mul(roty);
    
    TransformGroup trans = new TransformGroup(t3d);
    root.addChild(trans);
    
    Appearance yapp = createAppearance( new Color3f(1.0f, 1.0f, 0.0f) );
    Appearance rapp = createAppearance( new Color3f(1.0f, 0.0f, 0.0f) );
    Appearance bapp = createAppearance( new Color3f(0.0f, 0.0f, 1.0f) );
    
    Transform3D bt3d = new Transform3D();
    bt3d.set(new Vector3d(-0.22, -0.02, 0.22));
    TransformGroup btrans = new TransformGroup(bt3d);
    btrans.addChild(new Box( 0.16f, 0.16f, 0.16f, yapp ));
    trans.addChild(btrans);
    
    Transform3D ct3d = new Transform3D();
    ct3d.set( new Vector3d(-0.2, 0.0, -0.2) );
    TransformGroup ctrans = new TransformGroup(ct3d);
    ctrans.addChild( new Cone( 0.2f, 0.4f, Cone.BODY | Cone.CAP, rapp ) );
    trans.addChild(ctrans);
    
    Transform3D st3d = new Transform3D();
    st3d.set( new Vector3d(0.2, 0.0, 0.2) );
    TransformGroup strans = new TransformGroup(st3d);
    strans.addChild( new Sphere(0.2f, bapp) );
    trans.addChild(strans);
    
    return root;
  }
  
  private Light createLight(Color3f color, Vector3f vec) {
    DirectionalLight light = new DirectionalLight( color, vec );
    light.setInfluencingBounds( new BoundingSphere( new Point3d(), 100.0 ) );
    
    return light;
  }
  
  private Appearance createAppearance(Color3f color) {
    Appearance ap = new Appearance();
    ap.setCapability(Appearance.ALLOW_TRANSPARENCY_ATTRIBUTES_WRITE);

    Material mat = new Material();
    mat.setDiffuseColor(color);
    //mat.setSpecularColor(new Color3f(0.0f, 0.0f, 0.0f));
    //mat.setShininess(127.0f);
    ap.setMaterial(mat);
    
    if (tattr == null) {
      tattr = new TransparencyAttributes();
      tattr.setCapability(TransparencyAttributes.ALLOW_MODE_WRITE);
      tattr.setCapability(TransparencyAttributes.ALLOW_VALUE_WRITE);
    }
    ap.setTransparencyAttributes(tattr);

    return ap;
  }

  public static void main(String[] args) {
    Frame frame = new MainFrame(new AppearanceTest(), 500, 500);
  }
}